Trace FrameTreeNode Snapshots

content/browser/frame_host/frame_tree.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/frame_host/frame_tree.h"
 
 #include <queue>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/containers/hash_tables.h"
 #include "base/lazy_instance.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/navigator.h"
 #include "content/browser/frame_host/render_frame_host_factory.h"
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/frame_host/render_frame_proxy_host.h"
+#include "content/browser/frame_host/traced_frame_tree.h"
 #include "content/browser/renderer_host/render_view_host_factory.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/common/input_messages.h"
 #include "content/common/site_isolation_policy.h"
 #include "third_party/WebKit/public/web/WebSandboxFlags.h"
 
 namespace content {
 
 namespace {
 
@@ skipping 180 matching lines @@
   if (parent->current_frame_host()->GetProcess()->GetID() != process_id)
     return nullptr;
 
   scoped_ptr<FrameTreeNode> node(
       new FrameTreeNode(this, parent->navigator(), render_frame_delegate_,
                         render_view_delegate_, render_widget_delegate_,
                         manager_delegate_, scope, frame_name, sandbox_flags));
   FrameTreeNode* node_ptr = node.get();
   // AddChild is what creates the RenderFrameHost.
   parent->AddChild(node.Pass(), process_id, new_routing_id);
+  TraceSnapshot();
   return node_ptr->current_frame_host();
 }
 
 void FrameTree::RemoveFrame(FrameTreeNode* child) {
   FrameTreeNode* parent = child->parent();
   if (!parent) {
     NOTREACHED() << "Unexpected RemoveFrame call for main frame.";
     return;
   }
 
   parent->RemoveChild(child);
+  TraceSnapshot();
 }
 
 void FrameTree::CreateProxiesForSiteInstance(
     FrameTreeNode* source,
     SiteInstance* site_instance) {
   // Create the swapped out RVH for the new SiteInstance. This will create
   // a top-level swapped out RFH as well, which will then be wrapped by a
   // RenderFrameProxyHost.
   if (!source || !source->IsMainFrame()) {
     RenderViewHostImpl* render_view_host = GetRenderViewHost(site_instance);
@@ skipping 192 matching lines @@
   for (const auto& instance : frame_tree_site_instances) {
     if (instance == root_->current_frame_host()->GetSiteInstance())
       continue;
 
     RenderFrameProxyHost* proxy =
         root_->render_manager()->GetRenderFrameProxyHost(instance);
     proxy->Send(new InputMsg_SetFocus(proxy->GetRoutingID(), is_focused));
   }
 }
 
+void FrameTree::TraceSnapshot() const {
+  TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID("navigation", "FrameTree", this,
+      scoped_refptr<base::trace_event::ConvertableToTraceFormat>(
+          TracedFrameTree::Create(*this)));
+}
+
 }  // namespace content